The Pulley,groove, cataloged under National Stock Number 3020-00-477-3922, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-477-3922 |
| Primary Part Number | 134LM10037-5 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 0.410 INCHES NOMINAL BOTH ENDS IN |
| Bore Feature | INCLUDED |
| Bearing Quantity | 1 |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 0.620 INCHES NOMINAL IN |
| Design Form | PLAIN |
| Unable to Decode | UNABLE TO DECODE |
| First Step Face Largest Diameter and Location | 1.250 INCHES NOMINAL BOTH ENDS IN |
| Groove Radius | 0.093 INCHES NOMINAL IN |
| Groove Shape | U |
| Outside Diameter | 1.750 INCHES NOMINAL IN |
| Distance From Outside Flange/rim to Hub End and Location | 0.107 INCHES NOMINAL BOTH ENDS IN |
| Second Step Length | 0.045 INCHES NOMINAL BOTH ENDS IN |
| Style Designator | PLAIN |
| Material Document and Classification | QQ-A-225/9,T73 FED SPEC 1ST MATERIAL RESPONSE AND AISI E52100 OR SAE 52100 FED SPEC 2ND MATERIAL RESPONSE HUB |
| Material Document and Classification | QQ-A-225/9,T73 FED SPEC 1ST MATERIAL RESPONSE AND AISI E52100 OR SAE 52100 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Groove Depth | 0.250 INCHES NOMINAL IN |
| Bore Type | STRAIGHT |
| Bearings | INCLUDED |
| Groove Quantity | 1 |
| Protruding Hub Characteristic | STEPPED |
| Unable to Decode | UNABLE TO DECODE |
| First Step Length | 0.062 INCHES NOMINAL BOTH ENDS IN |
| Bearing Type | BALL |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY 7075 AND STEEL COMP E52100 HUB |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 134LM10037-5 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 134LM10037-5 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 3020-00-477-3922 is a Pulley,groove, manufactured by Northrop Grumman Systems Corporation, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-477-3922 has 1 manufacturer part number on file: 134LM10037-5 (Northrop Grumman Systems Corporation).
Key specifications for 134LM10037-5: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 0.410 INCHES NOMINAL BOTH ENDS IN; Bore Feature: INCLUDED; Bearing Quantity: 1. 28 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 3020-00-477-3922 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.